function change(obj){
    obj.src="/verification";
}
let yzm = null;
let vue = new Vue({
    el: "#app",
    methods: {
        yzm: function () {
            yzm = this.$refs.yzm.value;
        }
    }
});
$(function () {
    $("#dl").on('click',function(){
        let username = $("input[name='username']").val();
        let password = $("input[name='password']").val();
        if (username==""||password==""){
            $("#msg").css("display","block");
        }else{
            $("#myForm").submit();
        }
    })
});